IK / pins issue

I have both hands posed together exactly the way I want them, but I'd like to move the arms around without "breaking" the hands apart from each other. When I pin them to together, they still move with their respective arms...

Is there some way to pin them both so they move in concert? I've even been desperate enough to try parenting and grouping, but of course that doesn't work. I've searched around for a thread regarding this but couldn't find anything, sorry if I'm duplicating

Arigato, Kitakore! Now I can use the Active Pose tool, which only confused me before. Your suggestion worked, in that the hands no longer come apart when I move the arms but now the hands are frozen in place... What I really want is to keep the hands together and move them around. Is that even possible?